靈活設置橫豎屏，不用區(qū)分Push還是Present,都是可以設置。

第一步

勾選方向.png

在AppDelegate.h中添加旋轉屬性

/** 是否允許轉向 */
@property(nonatomic,assign) BOOL allowRotation;

在AppDelegate.m中添加轉屏的代理方法

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(nullable UIWindow *)window {
    
    if (self.allowRotation == YES) {
        //橫屏
        return UIInterfaceOrientationMaskLandscape;
        
    }else{
        //豎屏
        return UIInterfaceOrientationMaskPortrait;
        
    }
}

第二步

設置橫豎屏的核心方法宦言，我是直接把這個方法添加到了UIDevice的分類中，代碼如下：

UIDevice+TFDevice.h

#import <UIKit/UIKit.h>
@interface UIDevice (TFDevice)
/**
 * @interfaceOrientation 輸入要強制轉屏的方向
 */
+ (void)switchNewOrientation:(UIInterfaceOrientation)interfaceOrientation;
@end

UIDevice+TFDevice.m

#import "UIDevice+TFDevice.h"
 
@implementation UIDevice (TFDevice)
 
+ (void)switchNewOrientation:(UIInterfaceOrientation)interfaceOrientation {
        
 NSNumber *resetOrientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationUnknown];
 [[UIDevice currentDevice] setValue:resetOrientationTarget forKey:@"orientation"];
 NSNumber *orientationTarget = [NSNumber numberWithInt:interfaceOrientation];
 [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];
    
}
@end

第三步

在需要設置橫屏的控制器的ViewDidLoad中添加下面代碼：

- (void)viewDidLoad {
    [super viewDidLoad];
 
    AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    //允許轉成橫屏
    appDelegate.allowRotation = YES;
    //調用橫屏代碼
    [UIDevice switchNewOrientation:UIInterfaceOrientationLandscapeRight];

    // 屏幕常亮(不然會息屏)
    [[UIApplication sharedApplication] setIdleTimerDisabled:YES];
}

需要注意的是push過去的時候變成橫屏，pop出去的時候在設置豎屏融师，此時最好禁用系統(tǒng)的側滑返回手勢。

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    //禁用側滑手勢方法
    self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}
-(void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    //禁用側滑手勢方法
    self.navigationController.interactivePopGestureRecognizer.enabled = YES;
}

push控制器：

//點擊導航欄返回按鈕的時候調用蚁吝，所以Push出的控制器最好禁用側滑手勢：
AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
appDelegate.allowRotation = NO;//關閉橫屏僅允許豎屏
//切換到豎屏
[UIDevice switchNewOrientation:UIInterfaceOrientationPortrait];
   
[self.navigationController popViewControllerAnimated:YES];

// 還原
[[UIApplication sharedApplication] setIdleTimerDisabled:NO];

present控制器：

AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
appDelegate.allowRotation = NO;//關閉橫屏僅允許豎屏
//切換到豎屏
[UIDevice switchNewOrientation:UIInterfaceOrientationPortrait];
    
[self dismissViewControllerAnimated:YES completion:nil];

// 還原
[[UIApplication sharedApplication] setIdleTimerDisabled:NO];

到此大功告成, 快試試效果吧.